The SD0800-3111-185 from Advanced Photonix is a Photodiode with Wavelength Range 900 to 1700 nm, Capacitance 75 to 100 pF, Dark Current 0.5 to 5 nA, Responsivity/Photosensitivity 0.9 to 1 A/W, Active Area Diameter 1 mm. More details for SD0800-3111-185 can be seen below.